Metal-casting machine.



N0. 881,604. PATENTED SEPT. 25, 1906.

, P. DE GARDY.

METAL CASTING MACHINE.

APPLICATION FILED MAYIG, 1904.

5 SHEETSSHEBT l,

PATENTED SEPT. 25, 1906.

P. DE OARDY. METAL CASTING MACHINE.

APPLICATION FILED MAYIG, 1904.

5 SHEETS-SHEET z.

jriedera a/ji @76 4 I PATENTED SEPT. 25, 1906.

P. DE GARDY. METAL CASTING MACHINE.

APPLICATION FILED MAYIS, 1904.

5 SHEETSSHEET 3.

F. DE GARDY.

METAL CASTING MACHINE. APPLICATION FILED MAYIG, 1904.-

PATENTED 31 125, 1906.

5 SHEETSS HEET 4.

gaz '/mz Y Not PATENTED SEPT. 25, 1906. F. DB GARDY.

METAL CASTING MACHINE.

APPLICATION FILED MAY1G,190 4.

5 SHEETSSHBET 5v STATES FREDERICK DE CARDY, OF

BRASS CASTING?) 00., OF ILLINOIS.

PATENT OFFFOE.

lJlETAb-GAiSTlNG WlACHlNE.

Specification of Letters Patent.

Application filed May 16,1904. Serial No. 208,182.

, Tb (Z7 whom, it may concern/.-

-for operating the same.

has its bearing edges beveled, as at a,

Be it known that I, Frtnnnnrcx DE CARDY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Metal-Casting Machines, of which the following is a specification.

This invention relates to improvements in metal-casting machines, and has for its object to provide mechanism of this character by means of which the work of casting metal articles may be accomplished with facility.

Another object is to provide a machine in which metal or an alloy thereof fusing at a high temperature may be successfully used in the production of commercial articles possessing a hard smooth finish and in condition ready for use without the necessity of pnliminary dressing by hand.

In the drawings, Figure 1 is a side elevation of a machine embodying the improved features. Fig. 2 is a front elevation. Fig. 3 is a plan section on angular line 3, Figs. 2, 4, and 5. Fig. 4 is a vertical section on line l, Figs. 2 and 3. Fig. 5 is a vertical section on the lines 5 and 5, Fig. 4. Fig. 6 is a detail of the air pipe and valve.

A' may represent the main supportingframe as a whole; but minor parts thereof may be indicated by other reference characters in locating connecting details of the operating mechanism.

The trackrails 7 and 8 are a rigid part of the table'bed frame and have the reciprocating carr age or apron 9 mounted thereon. This carriage is provided on the under side with guide-ribs 10 and 11. The guide-rib 1D and engages a \i-groove 12, formed in the top of rail 7, as best shown in Fig. 2. This retains the carriage in its proper position and prevents a lateral movement thereof. The-rail 8 and the rib 11 have flat engaging surfaces, Fig. 2, and provide for expansion and contraction, as these parts are liable to be heated from the mold or die members in the operation of casting, and if both the carriage would be liable to stick at times and. prevent a free movement thereof.

The reciprocatin carriage 9 carries the casting-molds and the necessary mechanism The molds comprise the lower stationary Che member 13 and the upper movable die member 14, removopening and closing o rails were grooved ends of which are mounted on the retaining i guide-posts 16 and 17 and provide for a ver- Patented Sept-25,1906.

ably secured to a die block 15,,the respect ve r55 tical movement of the upper die member in i the same in the operation I f casting. The head 'end 18 of a threaded bolt 19, Fig. i, is loosely inserted in the upper side of the die-block 15, so as to have a slight. swivelin r action in conforming to any inequalities. This bolt is threaded in a sleeve 20, which is in turn fixed in the longitudinal center of a cross-head 21, having a vertical movement in the companion guide.- standards 22 and 23 of the reel rocating carriage 9. The bolt 19 provir es means for I lengthening or shortening the travel of the upper die member in accordance with the requirements of the work and is locked in place I of adjustment by a nut 24. The sleeve extends through the cross -head and is threadod and adjustable therein in connection with a threaded bolt 25, the lower end o which engages the upper end of the sleeve.

The upper flattened head end 26 of bolt 25 isv inserted in the lower bifurcated end of 'a crankrod .27, having one-half of a bearingbox 28 formed on the upper end thereof, as best shown in Fig. 4. The engaging ends of bolt 26 and the crank-rod are pivotally connectcd by a pin 29. The upper half I) of the bearing-box is held apart from the complimion half 28 by sleeves 30, through w ich clamping-bolts 31 and 32 are inserted .in re.

taining the boxes in the relative position shown. A double crank 33 is mounted on a revoluble crank-shaft 34, suitably supported from and located above the top of the carriage.

When the mold is closed, the pin will be in the lower half of the box, this change taking-- The crank-pin 35 is shown in the upper half of the box, the mold being open.

bolts 36 and 37. The companion cams 39 and 40 are adjustably mounted on the crankshaft and in line with the rollers 38 and adapted to come in contact therewith once in each revolution and impartfa -downward movement to the cross-head and close the mold at the proper time to receii e the tion of molten metal.

As the cams pass out of contact thecross-head is returned to its upper normal position and the mold opened by the crank connection before described. The bottom die-block 41 is made adjustable by means of slots 42 and clamping-bolts 43 inserted therein, as shown in Fig. 4.

abydnserted in the ,Motion is transmitted from a clutch-shaft 4 1 to the crank-shaft by a sprocket-chain 45, the clutch-shaft receiving motion from a driving-shaft 46 through the medium of a, belt connection 47, as s own in Fig. 1. The movement of the carriage and the o ening and closin of the molds are'control ed by hand, the clutch mechanism 48 being thrown into and out of engagement by a proper manipulation of clutch-lever 49. A cam-shaft 50, Figs. 1, 3, and 6, is located on the back part of the machine and is provided with suitable journal-bearin s, motion being transmitted thereto from the clutch-shaft by a sprocketchain B. This shaft has a number of cams mounted thereon for different purposes, as will be hereinafter described.

The molten-metal reservoir 51 has a pumpcylinder 52 located therein, as best shownin A pump piston or plun er 53 is movpump-cy inder and is provided vn'th a piston-rod 54. This rod has pump-cylinder at a a spring 55 mounted thereon, which serves to return the piston to its upper normal position after each down movement. The discharge end of anair-pipe 56 opens into the point above the highest position of the piston. This air-pipe eonnects with an air-tank, (not shown,) which contains air under pressure for supplying and injecting a charge of molten metalinto the mold-cavity 57. This air-supply is aul tomatically controlled by means of a valve 58-, Fi s. 1, 5, and 6, located in the airpipe, the Va ve being 0 ened and closed at prede termined interva s by actuating mechanism to be next described.

' One end of a link 59 is connected to the air-va1ve, the opposite end belng pivoted to one end of a second link 60, as atd, and set at an angle with reference to the first link. The olpposlte end of link 60 is pivoted, as at g, to t evouter end of a lever 61, the inner end of which is supported from the metalreservoir and has a pivotal bearing 62. A hanger 63 is secured to. the lever 61 and has a roller 64 journaled in the free end thereofand in line with and contactin a cam 65, mounted on cam-shaft 50, ass own in Figs. 3 and -5. The high side of cam 65 is normally in contactwith roller 64', the cam-shaft being at rest and the air-valve open to the atmosphere through an exhaust aperture 66, the passage from the air-supply under pressure being closed. This osition-of the air-valve and its actuating mec anis'm corresponds to the po. sition of the pump-piston in Fig. 4. When 1 anism. e 'A second cam is 70 and its roller :down and closes the air-valve from the outer atmosphere and opens the passage through the air-pipe from the air-tank to the pumppiston when the same is to be forced downward in practical working. A stop 69 limits the upwardmovement of the air-valve mechalso mounted on the camshaft and in position to have a'roll- 'ing'contact with a roller 71, journaled in the outer end of a horizontal lever 72, the inner end of which is bent upward at right angles to form the bell-crank extension 73, pivotally connecting with a link 7 4, which in turn connects with a link 75, as best shown in Fig. 1. One end of a shifting to the upper end of link 75, which is adapted to have a slight oscillating movement. I The shifting arm is provided with afulcrum-bearing 77, Fig. 3, and has a workingmovement in a horizontal plane. ward over the top of the molten-metal reservoir and has a pin 72,, Fig. 4, fixed in the inner end thereof, which extends downward and is secured to a valve-stem 78. This stem carries a valve 79, which at the properltime is adapted to close an aperture 80, opening into the metal-reservoir, and through which.the charge of molten metal flows into'the walled assage 81, leading into the pump-cylinder. l Vhen the cam-shaft is rotated and the high part 82 of cam 70 comes in contact with roller 71 it raises the corresponding end of lever 72 and theseries of jointed links, a rocking move' ment to arm 76, throws the "inner end inward, imparts a corresponding movement to the valvestem, seats the valve 79 in and closes the aperture 80, and shuts off the flow of metal from the reservoir to the pump.

Thls movement withdraws the valve end 83 of stem 78 from its position in closing an orifice 84 in the injector-hozzle 85', throu h which the molten metal melds. By the time the high part of cam 70 has rolled on-out of contact the molds have been backed up and received the charge of arm 76 is attached transmits therefrom, through- This arm extends inis forced into t e metal and the injector-orifice closed and the aperture between themetal-reservoir and pump reopened for another supply of metal to flow into the latter. The molten metal flows into the pump through the passage 81 and is forced outward through thesame passage when the piston descends. One end of a spring-arm 86 is attached to the lever 72, the other end passing under a brace 87 and bent downward just far enough so that the pressure on lever maintain a working contact between the cam 71. A third cam 88 is also 72 will be heavy enough to eccentrically mounted on the same camshaft and serves the purpose of moving the carriage on which the molds are mounted in one direction-that is, inwardto receive the casting charge of metal. naled m the upper end of a link 90 and posi tioned to be contacted by cam The link 90 extends downward through the carriage, the lower end having a pivotal bearing 91, as shown in Fi 5. These parts are shown in their normal position corresponding to the other 0 erative parts, the cam aha being at rest. hen the cam-shalt ro :i3(l,- the higher part of the cam 88 gradually comes in contact with its roller and imparts a hack ward movement to the carriage and brings the molds into position against' the injector nozzle. A set-screw 92, inserted in the rear end of the ;carriage and in line with link 90, provides means for regulating the throw of said link with reference to the movement of the carriage. The carriage is returned to its normal position after the high part of cam 88 passes out of contact w th its roller 89 by companion springs 93, fig. 1, one end of which is attached to the carriage, as at A", and the other ends to screw-threaded rods 94 and 95, extending through the front end of the stationary bed-frame and located on opposite sides of the carriage. The wing-nuts 96, threaded on the projecting. ends of rods 94 and 95, serve the purpose of maintaining the proper tension of springs 93.

A burner 97 is located under the metal-reservpir and connects with gas or other fuel supply in maintaining the casting metal in a molten condition for injection into the molds. The different parts of the machine are shown in the normal position of rest, the molds being open. In practical working the operator throws the clutch mechanism into engagement, which has the cilect of imparting 'mo'tion to the crank and cam shafts,

which operates to close the molds and impart a forward movement to the carriage in bringing the molds into position to receive a casting charge of. metal. At the same time the double valve controlling the flow of metal into the pump. and the injector-nozzle is moved to the opposite position from that shown in Fig. 4 and the opening from the reservoir into passage 81 closed and the orifice in the injector-nozzle opened as the pump-piston is forced'downward by the airpressure and a charge of metal injected into the moldsj As the carriage returns the molds ope'n, the object cast is removed, and the operation repeated. The travel of the reciprocating carriage is only three inches or less. The change of centers over which the sprocket-chain runs is so slight that the said A roller 89 is jourchain readily allows therefor, and the operation of the machine is not impeded.

Having thus described my invention, what i claim is- 1. In a metal-casting machine, a reciprocating carriage, the molds carried thereby and comprising a stationary die member and a movable die member, a cross-head, an adjustable connection between the cross-head an d movable die member, a cranleshaftfthe operative connection between. the cross-head and crank-slntl't, and means carried by the latter ior periodically con tart-ting and imparting a downward movement to the cross-head in the operation of closing the mold.

2. Ina metal-casting machine, a reciprocating carriage, the molds carried thereby and comprising a movable and a stationary member, a cross head positioned in the gui(lo-standards of said carriage and having the movable die' member connected therewith, a crank-shalt supported from and located above the guide-standards of said carriage the crank connection between the crosshead and crankshaft, whereby the crosshead is returned to its upper normal position, after each down movement thereof, the companion cams mounted on the crank-shaft, and means interposed between the cams and cross-head and positioned to be contacted by the cams once in each revolution and impart the downward movement to the crosshead. l

3.- In a metal-casting machine, a reciprocating cariage, the castinganolds mounted thereon, the operative means carried by said carriage tor openingand closing the molds at the proper time, a molten-metal reservoir, a pump-cylinder located therein, a piston in serted in the pump-cylinder, an inlet-passage from the reservoir into said cylinder ,an outletpassage ther from into the molds, means for alternately opening and closing said passages in accordance with the direction in which the pump-piston is moving, an air-pipe charged under pressure and opening into said cylinder, a valve inserted in the air-pipe and having two positions therein, viz; one position opening the passage from the air-supply into said cylinder, and the second position closing the 7 working pressure from the source of supply and. opening the exhaust from the cylinder into the atmosphere, and means for actuating said valver a In testimony 'vhereof I have signed my name to this specification in the presence of. two subscribing witnesses.

" FREDERICK DE CARDY.

Witnesses:

i L. B. COUPLAND, G. E. Cannon. 

